> Page allocator is never going to be as fast as slab allocator, for> issues I explained a long time ago. Not to say it can't be improved,> just stating facts.

Why not? Remember the discussion we had a while ago. You can bring thepages into a state where minimal manipulations are required for alloc freeand avoid all the checks in the hot paths. The SLUB method could be usedtaking a big contiguous chunk and then issueing page size portions of it.That could be quite fast.